Subtraction with Regrouping: 115 − 39

Subtraction with Regrouping Calculator
Minuend
Subtrahend

What is 115 − 39?

Answer

115 − 39 =
76

With regrouping: 2 borrows — from the tens and the hundreds

115 − 39 in a column. Above the columns: the values after borrowing — a crossed-out digit is replaced by the number above it; +10 marks a column that received a borrowed ten.
010+10
1(was 1, now 0)1(was 1, now 10)5 (was 5, now 15)
−39
76

Column by column: 115 − 39

  • Ones: 5 is less than 9 — borrow 1 ten: tens 1 → 0; 15 − 9 = 6 — write 6.
  • Tens: after borrowing, 0; 0 is less than 3 — borrow 1 hundred: hundreds 1 → 0; 10 − 3 = 7 — write 7.
  • Hundreds: after borrowing, 0 — a leading zero is not written.

115 − 39 = 76

Second check: 115 − 76 = 39

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Column subtractions of 39

ExampleDifference
86 − 3947
91 − 3952
93 − 3954
97 − 3958
102 − 3963
104 − 3965
106 − 3967
108 − 3969
110 − 3971
113 − 3974
115 − 3976
117 − 3978
122 − 3983
124 − 3985
128 − 3989
131 − 3992
133 − 3994
137 − 3998
144 − 39105
175 − 39136

FAQ

What is 115 − 39?

115 − 39 = 76

How do you check that 115 − 39 = 76?

Add the difference and the subtrahend: 76 + 39 = 115. Getting the minuend back means the difference is right.

How many times do you borrow in 115 − 39?

2 borrows: each time the top digit was smaller than the one below it, 1 was borrowed from the column on the left.

See Also